Browse Prior Art Database

Head Suspension Assemblies With Internally Preloaded Dimple

IP.com Disclosure Number: IPCOM000047440D
Original Publication Date: 1983-Nov-01
Included in the Prior Art Database: 2005-Feb-07
Document File: 2 page(s) / 34K

Publishing Venue

IBM

Related People

Nayak, JH: AUTHOR

Abstract

This article describes an improvement on the suspension assemblies used in current magnetic disk files. The key concept of this article is as follows: The contact force between the flexure dimple and the suspension is increased by introducing an internal preload without altering or affecting the final geometry of the suspension assembly or the slider bearing preload. For this purpose only a minor alteration in the shape of the flexure profile is required. This is shown in Fig. 1b. The flexure, as manufactured, is to be made such that the flexure legs are curving backwards to a predetermined shape, displacing the dimple towards the suspension side by a prespecified amount. When the flexure is welded to the suspension, the suspension presses the dimple and flattens the flexure legs (Fig. 1c).

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Head Suspension Assemblies With Internally Preloaded Dimple

This article describes an improvement on the suspension assemblies used in current magnetic disk files. The key concept of this article is as follows: The contact force between the flexure dimple and the suspension is increased by introducing an internal preload without altering or affecting the final geometry of the suspension assembly or the slider bearing preload. For this purpose only a minor alteration in the shape of the flexure profile is required. This is shown in Fig. 1b. The flexure, as manufactured, is to be made such that the flexure legs are curving backwards to a predetermined shape, displacing the dimple towards the suspension side by a prespecified amount. When the flexure is welded to the suspension, the suspension presses the dimple and flattens the flexure legs (Fig. 1c). The final geometry of the assembly would therefore be the same as at present in current disk files. However, because of the initial form of the flexure legs, an internal preload will develop between the dimple and suspension. The amount of this internal preload at the dimple can be controlled by controlling the initial profile of the flexure legs. The dimple preload developed is purely internal to the suspension assembly and is not transmitted to the slider or the suspension support. This internally preloaded dimple suspension assembly can then be used to preload and actuate the slider. The bearing preload is purely d...